Telephone amplifier



FIG. 1 is a top plan view of a telephone amplifier showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a telephone amplifier, substantially as shown and described. 